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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.
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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
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In 1864, the first barbiturate (barbituric acid) was synthesized.